Romans 2:25-28

For circumcision indeed profiteth, if thou be a doer of the law: but if thou be a transgressor of the law, thy circumcision is become uncircumcision. If therefore the uncircumcision keep the ordinances of the law, shall not his uncircumcision be reckoned for circumcision? and shall not the uncircumcision which is by nature, if it fulfil the law, judge thee, who with the letter and circumcision art a transgressor of the law? For he is not a Jew who is one outwardly; neither is that circumcision which is outward in the flesh